Documentation / Node reference / geo nodes
geo/LineExpand
Widens a polyline into a flat ribbon of triangles.
Transform
Pushes each point of a segment chain out to both sides, at right angles to the line and to `up`, and meshes the result. What comes out is a RIBBON: a flat strip that follows the curve, still facing whichever way `up` says. It is inherently 3D, which is the difference from the flat-shape nodes.
It assumes ONE OPEN CHAIN per object. A chain that comes back to its first point still gets its first and last vertices treated as ends, so a closed loop shows a small notch at the seam where the two ends butt together instead of joining. Break the loop somewhere it will not be seen, or use a node that handles closure.
The corners are MITERED with no limit, so a sharp corner reaches out a long way and an exact reversal blows the miter out entirely. The ends are cut square.
geo/PolyWire is the round-tube version of the same idea. For a curve with a width as a FLAT SHAPE that can be booleaned rather than as a mesh, use geo/M2DStroke, which handles closed loops, sharp corners and self-crossings.
Parameters
| Name | Type | What it does |
|---|---|---|
| up | Vector3 | Which way the ribbon faces. The width is laid out at right angles to both this and the line, so this is what stops the strip twisting along the curve. |
| amount | Float | How far each point is pushed out to EACH side, so the ribbon is twice this across. |
See also
This page is generated from the engine, so it describes the release you can download. The same text is in the editor's Help panel next to the node itself.